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Bi-Directional Amplifier (BDA) and Distributed Antenna System (DAS) installations have become a routine part of high-rise life-safety in South Florida. They exist for one reason: when a first responder enters your building, their radio has to work.
Modern building construction (concrete, low-E glass, deep parking levels, mechanical floors) degrades public-safety radio signal. The fire code requires that signal be restored where the AHJ measures it deficient.
If your building is a high-rise condo, hotel, hospital, large office, school, ALF, or government facility, you should expect a BDA / DAS evaluation as part of your compliance program. Contact your local AHJ for jurisdiction-specific guidance.